Sebastien, I think you should take a look at this forum thread: http://ubuntuforums.org/showthread.php?t=388765
It's what the previous bug was reported on. -- gnome-session hangs when "lo" is not correctly configured https://launchpad.net/bugs/26419 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs